Answer
$-10^{\circ}~C$
Work Step by Step
$C = \frac{5}{9}(F-32)$
We can use this formula to convert from Fahrenheit to Celsius. It is given in the question that $F = 14$ since the temperature on the Fahrenheit scale is $14^{\circ}~F$.
$C = \frac{5}{9}(F-32)$
$C = \frac{5}{9}(14-32)$
$C = \frac{5}{9}(-18)$
$C = -10$
The temperature on the Celsius scale is $-10^{\circ}~C$